Holy Eclipse

Weapon (any axe), uncommon (requires attunement by a cleric or paladin)

This double-bladed axe depicts a sun on one blade and a moon on the other. You are proficient with the axe while you're attuned to it. While holding it, you can use a bonus action to expend a use of your Channel Divinity to cause the axe to glow with a warm or cool radiance (your choice each time), shedding bright light in a 20-foot-radius and dim light for an additional 20 feet. The light remains for 1 minute or until you end the effect early (no action required), during which time the first target you hit with it on a turn takes an extra 1d6 radiant or necrotic damage from the attack (your choice each time).

Divinity is found in both the light and the dark. You need only choose which side to touch.